Kenosha Pass

When Keystone Resort introduced its two-hour guided hike up Decrum Mountain in 2009, it dubbed the grueling leg- and lung-burner the “2,000-Calorie Hike” because of the energy trekkers burn as they gain 1,000 feet during the six-mile round-trip route. With that in mind, we came up with a few of our...

Why we love it: It is one of the most accessible parts of the Colorado Trail (with views of South Park to boot).
When to go: The path gets crowded with horses and bikers during the day, so hit the trailhead in late afternoon when the ponies are tired and the two-wheelers...